Toilet flush valve



FIG. 1 is a perspective view of the present invention operably engaged with a toilet; and

FIG. 2 is a front view of the present invention; and

FIG. 3 is a rear view of the present invention; and

FIG. 4 is a right side view of the present invention; and,

FIG. 5 is a left side view of the present invention.

Wherein the dotted lines herein form no part of the claimed design and are included to illustrate use and environment only. 

CLAIM The ornamental design for the toilet flush valve, as shown and described. 